Anti-resonant hollow-core fiber

Abstract

An antiresonance hollow-core fiber of the present disclosure is provided with: an outer cladding having a pipe shape extending along a fiber center axis; and a plurality of inner cladding elements that each have a pipe shape and are arranged in an internal region surrounded by an inner wall surface of the outer cladding, in contact with the inner wall surface so as to encircle a space forming a core region. In a cross section of the internal region, the regions that remain after excluding partial regions occupied by the plurality of inner cladding elements including the internal spaces of the plurality of inner cladding elements are filled with a gas that has a lower optical absorption than H2 in a wavelength band between 1 μm and 2 μm inclusive, and a diffusion coefficient smaller than that of Ne.

Dependencies are inferred from the claim text.